hw/s390x/s390-virtio-ccw.c

   1 /*
   2  * virtio ccw machine
   3  *
   4  * Copyright 2012 IBM Corp.
   5  * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
   6  *
   7  * This work is licensed under the terms of the GNU GPL, version 2 or (at
   8  * your option) any later version. See the COPYING file in the top-level
   9  * directory.
  10  */
  11
  12 #include "qemu/osdep.h"
  13 #include "hw/boards.h"
  14 #include "exec/address-spaces.h"
  15 #include "s390-virtio.h"
  16 #include "hw/s390x/sclp.h"
  17 #include "hw/s390x/s390_flic.h"
  18 #include "ioinst.h"
  19 #include "css.h"
  20 #include "virtio-ccw.h"
  21 #include "qemu/config-file.h"
  22 #include "s390-pci-bus.h"
  23 #include "hw/s390x/storage-keys.h"
  24 #include "hw/compat.h"
  25 #include "hw/s390x/s390-virtio-ccw.h"
  26
  27 static const char *const reset_dev_types[] = {
  28     "virtual-css-bridge",
  29     "s390-sclp-event-facility",
  30     "s390-flic",
  31     "diag288",
  32 };
  33
  34 void subsystem_reset(void)
  35 {
  36     DeviceState *dev;
  37     int i;
  38
  39     for (i = 0; i < ARRAY_SIZE(reset_dev_types); i++) {
  40         dev = DEVICE(object_resolve_path_type("", reset_dev_types[i], NULL));
  41         if (dev) {
  42             qdev_reset_all(dev);
  43         }
  44     }
  45 }
  46
  47 static int virtio_ccw_hcall_notify(const uint64_t *args)
  48 {
  49     uint64_t subch_id = args[0];
  50     uint64_t queue = args[1];
  51     SubchDev *sch;
  52     int cssid, ssid, schid, m;
  53
  54     if (ioinst_disassemble_sch_ident(subch_id, &m, &cssid, &ssid, &schid)) {
  55         return -EINVAL;
  56     }
  57     sch = css_find_subch(m, cssid, ssid, schid);
  58     if (!sch || !css_subch_visible(sch)) {
  59         return -EINVAL;
  60     }
  61     if (queue >= VIRTIO_CCW_QUEUE_MAX) {
  62         return -EINVAL;
  63     }
  64     virtio_queue_notify(virtio_ccw_get_vdev(sch), queue);
  65     return 0;
  66
  67 }
  68
  69 static int virtio_ccw_hcall_early_printk(const uint64_t *args)
  70 {
  71     uint64_t mem = args[0];
  72
  73     if (mem < ram_size) {
  74         /* Early printk */
  75         return 0;
  76     }
  77     return -EINVAL;
  78 }
  79
  80 static void virtio_ccw_register_hcalls(void)
  81 {
  82     s390_register_virtio_hypercall(KVM_S390_VIRTIO_CCW_NOTIFY,
  83                                    virtio_ccw_hcall_notify);
  84     /* Tolerate early printk. */
  85     s390_register_virtio_hypercall(KVM_S390_VIRTIO_NOTIFY,
  86                                    virtio_ccw_hcall_early_printk);
  87 }
  88
  89 void s390_memory_init(ram_addr_t mem_size)
  90 {
  91     MemoryRegion *sysmem = get_system_memory();
  92     MemoryRegion *ram = g_new(MemoryRegion, 1);
  93
  94     /* allocate RAM for core */
  95     memory_region_allocate_system_memory(ram, NULL, "s390.ram", mem_size);
  96     memory_region_add_subregion(sysmem, 0, ram);
  97
  98     /* Initialize storage key device */
  99     s390_skeys_init();
 100 }
 101
 102 static void ccw_init(MachineState *machine)
 103 {
 104     int ret;
 105     VirtualCssBus *css_bus;
 106     DeviceState *dev;
 107
 108     s390_sclp_init();
 109     s390_memory_init(machine->ram_size);
 110
 111     /* get a BUS */
 112     css_bus = virtual_css_bus_init();
 113     s390_init_ipl_dev(machine->kernel_filename, machine->kernel_cmdline,
 114                       machine->initrd_filename, "s390-ccw.img", true);
 115     s390_flic_init();
 116
 117     dev = qdev_create(NULL, TYPE_S390_PCI_HOST_BRIDGE);
 118     object_property_add_child(qdev_get_machine(), TYPE_S390_PCI_HOST_BRIDGE,
 119                               OBJECT(dev), NULL);
 120     qdev_init_nofail(dev);
 121
 122     /* register hypercalls */
 123     virtio_ccw_register_hcalls();
 124
 125     /* init CPUs */
 126     s390_init_cpus(machine);
 127
 128     if (kvm_enabled()) {
 129         kvm_s390_enable_css_support(s390_cpu_addr2state(0));
 130     }
 131     /*
 132      * Create virtual css and set it as default so that non mcss-e
 133      * enabled guests only see virtio devices.
 134      */
 135     ret = css_create_css_image(VIRTUAL_CSSID, true);
 136     assert(ret == 0);
 137
 138     /* Create VirtIO network adapters */
 139     s390_create_virtio_net(BUS(css_bus), "virtio-net-ccw");
 140
 141     /* Register savevm handler for guest TOD clock */
 142     register_savevm(NULL, "todclock", 0, 1,
 143                     gtod_save, gtod_load, kvm_state);
 144 }
 145
 146 static void s390_cpu_plug(HotplugHandler *hotplug_dev,
 147                         DeviceState *dev, Error **errp)
 148 {
 149     gchar *name;
 150     S390CPU *cpu = S390_CPU(dev);
 151     CPUState *cs = CPU(dev);
 152
 153     name = g_strdup_printf("cpu[%i]", cpu->env.cpu_num);
 154     object_property_set_link(OBJECT(hotplug_dev), OBJECT(cs), name,
 155                              errp);
 156     g_free(name);
 157 }
 158
 159 static void s390_machine_device_plug(HotplugHandler *hotplug_dev,
 160                                      DeviceState *dev, Error **errp)
 161 {
 162     if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
 163         s390_cpu_plug(hotplug_dev, dev, errp);
 164     }
 165 }
 166
 167 static HotplugHandler *s390_get_hotplug_handler(MachineState *machine,
 168                                                 DeviceState *dev)
 169 {
 170     if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
 171         return HOTPLUG_HANDLER(machine);
 172     }
 173     return NULL;
 174 }
 175
 176 static void s390_hot_add_cpu(const int64_t id, Error **errp)
 177 {
 178     MachineState *machine = MACHINE(qdev_get_machine());
 179     Error *err = NULL;
 180
 181     s390x_new_cpu(machine->cpu_model, id, &err);
 182     error_propagate(errp, err);
 183 }
 184
 185 static void ccw_machine_class_init(ObjectClass *oc, void *data)
 186 {
 187     MachineClass *mc = MACHINE_CLASS(oc);
 188     NMIClass *nc = NMI_CLASS(oc);
 189     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
 190
 191     mc->init = ccw_init;
 192     mc->reset = s390_machine_reset;
 193     mc->hot_add_cpu = s390_hot_add_cpu;
 194     mc->block_default_type = IF_VIRTIO;
 195     mc->no_cdrom = 1;
 196     mc->no_floppy = 1;
 197     mc->no_serial = 1;
 198     mc->no_parallel = 1;
 199     mc->no_sdcard = 1;
 200     mc->use_sclp = 1;
 201     mc->max_cpus = 255;
 202     mc->get_hotplug_handler = s390_get_hotplug_handler;
 203     hc->plug = s390_machine_device_plug;
 204     nc->nmi_monitor_handler = s390_nmi;
 205 }
 206
 207 static inline bool machine_get_aes_key_wrap(Object *obj, Error **errp)
 208 {
 209     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 210
 211     return ms->aes_key_wrap;
 212 }
 213
 214 static inline void machine_set_aes_key_wrap(Object *obj, bool value,
 215                                             Error **errp)
 216 {
 217     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 218
 219     ms->aes_key_wrap = value;
 220 }
 221
 222 static inline bool machine_get_dea_key_wrap(Object *obj, Error **errp)
 223 {
 224     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 225
 226     return ms->dea_key_wrap;
 227 }
 228
 229 static inline void machine_set_dea_key_wrap(Object *obj, bool value,
 230                                             Error **errp)
 231 {
 232     S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
 233
 234     ms->dea_key_wrap = value;
 235 }
 236
 237 static inline void s390_machine_initfn(Object *obj)
 238 {
 239     object_property_add_bool(obj, "aes-key-wrap",
 240                              machine_get_aes_key_wrap,
 241                              machine_set_aes_key_wrap, NULL);
 242     object_property_set_description(obj, "aes-key-wrap",
 243             "enable/disable AES key wrapping using the CPACF wrapping key",
 244             NULL);
 245     object_property_set_bool(obj, true, "aes-key-wrap", NULL);
 246
 247     object_property_add_bool(obj, "dea-key-wrap",
 248                              machine_get_dea_key_wrap,
 249                              machine_set_dea_key_wrap, NULL);
 250     object_property_set_description(obj, "dea-key-wrap",
 251             "enable/disable DEA key wrapping using the CPACF wrapping key",
 252             NULL);
 253     object_property_set_bool(obj, true, "dea-key-wrap", NULL);
 254 }
 255
 256 static const TypeInfo ccw_machine_info = {
 257     .name          = TYPE_S390_CCW_MACHINE,
 258     .parent        = TYPE_MACHINE,
 259     .abstract      = true,
 260     .instance_size = sizeof(S390CcwMachineState),
 261     .instance_init = s390_machine_initfn,
 262     .class_init    = ccw_machine_class_init,
 263     .interfaces = (InterfaceInfo[]) {
 264         { TYPE_NMI },
 265         { TYPE_HOTPLUG_HANDLER},
 266         { }
 267     },
 268 };
 269
 270 #define DEFINE_CCW_MACHINE(suffix, verstr, latest)                            \
 271     static void ccw_machine_##suffix##_class_init(ObjectClass *oc,            \
 272                                                   void *data)                 \
 273     {                                                                         \
 274         MachineClass *mc = MACHINE_CLASS(oc);                                 \
 275         ccw_machine_##suffix##_class_options(mc);                             \
 276         mc->desc = "VirtIO-ccw based S390 machine v" verstr;                  \
 277         if (latest) {                                                         \
 278             mc->alias = "s390-ccw-virtio";                                    \
 279             mc->is_default = 1;                                               \
 280         }                                                                     \
 281     }                                                                         \
 282     static void ccw_machine_##suffix##_instance_init(Object *obj)             \
 283     {                                                                         \
 284         MachineState *machine = MACHINE(obj);                                 \
 285         ccw_machine_##suffix##_instance_options(machine);                     \
 286     }                                                                         \
 287     static const TypeInfo ccw_machine_##suffix##_info = {                     \
 288         .name = MACHINE_TYPE_NAME("s390-ccw-virtio-" verstr),                 \
 289         .parent = TYPE_S390_CCW_MACHINE,                                      \
 290         .class_init = ccw_machine_##suffix##_class_init,                      \
 291         .instance_init = ccw_machine_##suffix##_instance_init,                \
 292     };                                                                        \
 293     static void ccw_machine_register_##suffix(void)                           \
 294     {                                                                         \
 295         type_register_static(&ccw_machine_##suffix##_info);                   \
 296     }                                                                         \
 297     type_init(ccw_machine_register_##suffix)
 298
 299 #define CCW_COMPAT_2_5 \
 300         HW_COMPAT_2_5
 301
 302 #define CCW_COMPAT_2_4 \
 303         CCW_COMPAT_2_5 \
 304         HW_COMPAT_2_4 \
 305         {\
 306             .driver   = TYPE_S390_SKEYS,\
 307             .property = "migration-enabled",\
 308             .value    = "off",\
 309         },{\
 310             .driver   = "virtio-blk-ccw",\
 311             .property = "max_revision",\
 312             .value    = "0",\
 313         },{\
 314             .driver   = "virtio-balloon-ccw",\
 315             .property = "max_revision",\
 316             .value    = "0",\
 317         },{\
 318             .driver   = "virtio-serial-ccw",\
 319             .property = "max_revision",\
 320             .value    = "0",\
 321         },{\
 322             .driver   = "virtio-9p-ccw",\
 323             .property = "max_revision",\
 324             .value    = "0",\
 325         },{\
 326             .driver   = "virtio-rng-ccw",\
 327             .property = "max_revision",\
 328             .value    = "0",\
 329         },{\
 330             .driver   = "virtio-net-ccw",\
 331             .property = "max_revision",\
 332             .value    = "0",\
 333         },{\
 334             .driver   = "virtio-scsi-ccw",\
 335             .property = "max_revision",\
 336             .value    = "0",\
 337         },{\
 338             .driver   = "vhost-scsi-ccw",\
 339             .property = "max_revision",\
 340             .value    = "0",\
 341         },
 342
 343 static void ccw_machine_2_6_instance_options(MachineState *machine)
 344 {
 345 }
 346
 347 static void ccw_machine_2_6_class_options(MachineClass *mc)
 348 {
 349 }
 350 DEFINE_CCW_MACHINE(2_6, "2.6", true);
 351
 352 static void ccw_machine_2_5_instance_options(MachineState *machine)
 353 {
 354 }
 355
 356 static void ccw_machine_2_5_class_options(MachineClass *mc)
 357 {
 358     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_5);
 359 }
 360 DEFINE_CCW_MACHINE(2_5, "2.5", false);
 361
 362 static void ccw_machine_2_4_instance_options(MachineState *machine)
 363 {
 364     ccw_machine_2_5_instance_options(machine);
 365 }
 366
 367 static void ccw_machine_2_4_class_options(MachineClass *mc)
 368 {
 369     SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_4);
 370 }
 371 DEFINE_CCW_MACHINE(2_4, "2.4", false);
 372
 373 static void ccw_machine_register_types(void)
 374 {
 375     type_register_static(&ccw_machine_info);
 376 }
 377
 378 type_init(ccw_machine_register_types)